Just thinking over what this trailer appears to show. There had been some talk a while ago (discussed in the thread) that Bond had retired at the start of this movie and some of us thought it a bit silly that, having only started his 00 career in Casino, he had already retired (shades of The Dark Knight Rises?). But instead, it appears that he was presumed dead. Incidentally, the scene with M reading his obituary seems to be an homage to You Only Live Twice, the book of which ends with his obit.
I'm guessing that the 'take the shot' scene will be in the pre-credits sequence and, with other 00 agents having been assassinated, Bond will suddenly return from the dead. He'll have to be assessed (the psych scenes we've seen in other trailers) and a reluctant M and Ralph Fiennnes will have no choice and no alternative to help them with this threat.